Muffin pan



FIG. 1 is a perspective view of the muffin pan;

FIG. 2 is a top view of the muffin pan shown in FIG. 1;

FIG. 3 is a cross sectional view of the muffin pan along A—A of FIG. 2;

FIG. 4 is a bottom view of the muffin pan of FIG. 1; and,

FIG. 5 is a side view of the muffin pan of FIG. 1. 

The ornamental design for the muffin pan, as shown and described. 